Answer
Before gold leaf on wood, smooth with 220, then scuff sealed primer with 320 or 400.
Why it happens
Decorative leaf needs a very smooth sealed base because thin leaf highlights defects.
Recommended grit
Use 220 for smoothing, then 320 or 400 after primer or sealer.
Wet or dry
Dry.
Success check
The base feels smooth and has no visible scratch lines before leafing.
What to do
- Smooth bare wood with 220.
- Apply primer or sealer as needed.
- Scuff the sealed surface with 320 or 400.
- Remove dust before adhesive size or leaf.
Avoid: Do not apply gold leaf over dust or rough primer.